Qualification: 
Ph.D, M.E
p_kkumar@cb.amrita.edu

Krishna Kumar P. currently serves as Assistant Professor(SG) & Dy.CoE at Department of Mechanical Engineering, School of Engineering, Coimbatore Campus. His areas of research include Design and Analysis, Metal Cutting and Micro Machining.

Educational Qualification

Degree

Year of Completion

Name of the Institution

Name of the Board / University

Ph D

2017

Amrita School of Engineering, Coimbatore

Amrita Vishwa Vidyapeetham

ME

2000

PSG College of Technology

Bharathiar

BE

1998

Maharaja Engineering College

Bharathiar

Experience

S.No

 

Name of the Organisation

 

Period of Service Designation

 

1 Amrita  School of Engineering 01/07/2010 to Present Assistant Professor(SG)
2 Amrita  School of Engineering 01/ 07/2007 to 30/06/2010 Assistant Professor
3 Amrita School of Engineering 01/07 /2004 to  30/06/2007 Senior Lecturer
4 Amrita School of Engineering 02/02-2000 to 30 /06 /2004 Lecturer

Projects

S. No. Name of the Project Name of the Funding Agency Status Project Grant / Assistance (Rs.) Duration of the Project
  Process Monitoring and Control of Ultra Precision Machining of Titanium alloys * DRDO Completed
June 2012
14.00 Lakhs 2 years 3 months
2. Fault diagnosis of dynamic mechanical systems based on signal processing using machine learning techniques DRDO Completed
June 2015
28.89 Lakhs 3 years
3 Investigations into the surface integrity of Ti alloys during high speed machining* AR&DB Completed Sept.  2016 Rs.9.06 Lakhs 2 Years
4 Cloud based hybrid pattern recognition approach for fault diagnosis of motor driven rotating machines using motor current signature analysis DRDO Submitted
October 2016
R.30.90 Lakhs 3 Years

Seminars, Workshops and Conferences Organised

  • Workshop on Condition Monitoring- Welding and Machining and applications – 25th March 2015
  • Two day workshop on Recent Trends in Manufacturing – 27.03.2014 to 28.03.2014 – funded by ISRO
  • CNC Programming and Operations – 07.01.2013 to 11.01.2013
  • Two day workshop on Recent Trends in Machining - 25th and 26th August 2011 –funded by ISRO and DRDO
  • CNC Programming and Operations – 26.12.2011 to 30.12.2011
  • COSMA 2011 – 14.12.2011 to 16.12.2011 – served as a committee member
  • Actively participated in other International Conferences and Workshops Organized by the department in different committees like WCM.,etc.,

Present Responsibilities at Department Level

  • M.Tech Manufacturing Engineering - Program Coordinator
  • M.Tech Project Coordinator Lab In-charge
  • Special Machines BoS Member
  • M.Tech Manufacturing Engineering AUMS coordinator

Present Responsibilities at School Level

Deputy Controller of Examinations

Responsibilities Held

  • Time table in-charge – department level – 7 years
  • Time table coordinator – school level – 5 years
  • B.Tech admission – counselling – seat allotment coordinator – 4 years
  • B.Tech admission – Exhibition in-charge at various venues in Tamilnadu
  • AUMS committee member – school level
  • Department Library in-charge
  • Lab In charge- Lathe and Press
  • Shop Sports Day – Event In-charge
  • Float in-charge – Gokulastami - 2010

Ashram Activities

  • Amala Bharatham Cleaning Programme
  • Food Committee in charge during AMMA’s Birthday celebrations.
  • Crowd control – AMMA visits to Kovai.

Publications

Publication Type: Journal Article

Year of Conference Publication Type Title

2018

Journal Article

Krishna Kumar P., Rameshkumar, K., and Ramachandran, K. I., “Acoustic Emission-Based Tool Condition Classification in a Precision High-Speed Machining of Titanium Alloy: A Machine Learning Approach”, International Journal of Computational Intelligence and Applications, vol. 17, 2018.[Abstract]


Mechanical and chemical properties of titanium alloy have led to its wide range of applications in aerospace and biomedical industries. The heat generation and its transfer from the cutting zone are critical in machining of titanium alloys. The process of transferring heat from the primary cutting zone is difficult due to poor thermal conductivity of titanium alloy, and it will lead to rapid tool wear and poor surface finish. An effective tool monitoring system is essential to predict such variations during machining process. In this study, using a high-speed precision mill, experiments are conducted under optimum cutting conditions with an objective of maximizing the life of tungsten carbide tool. Tool wear profile is established and tool conditions are arrived on the basis of the surface roughness. Acoustic emission (AE) signals are captured using an AE sensor during machining of titanium alloy. Statistical features are extracted in time and frequency domain. Features that contain rich information about the tool conditions are selected using J48 decision tree (DT) algorithm. Tool condition classification abilities of DT and support vector machines are studied in time and frequency domains. © 2018 World Scientific Publishing Europe Ltd.

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2018

Journal Article

Krishna Kumar P., Rameshkumar, K., and Ramachandran, K. I., “Feature level fusion of vibration and acoustic emission signals in tool condition monitoring using machine learning classifiers”, International Journal of Prognostics and Health Management, vol. 9, no. 8, pp. 2153-2648, 2018.[Abstract]


To implement the tool condition monitoring system in a metal cutting process, it is necessary to have sensors which will be able to detect the tool conditions to initiate remedial action. There are different signals for monitoring the cutting process which may require different sensors and signal processing techniques. Each of these signals is capable of providing information about the process at different reliability level. To arrive a good, reliable and robust decision, it is necessary to integrate the features of the different signals captured by the sensors. In this paper, an attempt is made to fuse the features of acoustic emission and vibration signals captured in a precision high speed machining center for monitoring the tool conditions. Tool conditions are classified using machine learning classifiers. The classification efficiency of machine learning algorithms are studied in time-domain, frequencydomain and time-frequency domain by feature level fusion of features extracted from vibration and acoustic emission signature. © 2018, Prognostics and Health Management Society. All rights reserved.

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2016

Journal Article

Krishna Kumar P., Sripathi, J., Vijay, P., and Ramachandran, K. I., “Finite Element Modelling and Residual Stress Prediction in End Milling of Ti6Al4Valloy”, IOP Conference Series: Materials Science and Engineering, vol. 149, p. 012154, 2016.[Abstract]


Titanium and its alloys are materials that exhibit unique combination of mechanical and physical properties that enable their usage in various fields. In spite of having a lot of advantages, their usage is limited because they are difficult to machine due to their inherent properties of high specific heat capacity, reactivity with tool and low thermal conductivity thereby causing excessive tool wear. To facilitate the process of machining, it becomes necessary to find out and relieve the residual stress caused during machining. Since experiments cannot be performed for each instance, creation of an FE model is desirable. In this paper a finite element analysis (FEA) of the machining of Ti6Al4V for different cutting speeds is presented. A 3D finite element model is developed with the Titanium alloy (Ti6Al4V) as the workpiece and a four flute carbide tip end mill cutter as the tool to predict the residual stress developed within the titanium alloy after machining. The finite element model utilises the Johnson-Cook model to depict the plasticity and the damage criteria and implements the Arbitrary Lagrangian Eulerian (ALE) formulation to increase the accuracy of the model. The FE model has been developed and the findings are presented. The results indicate that residual stresses are maximum at the surface and decrease linearly along the depth and increase as the cutting speed and depth of cut are increased.

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2015

Journal Article

Dr. Saimurugan M., T. Praveenkumar, Krishna Kumar P., and Ramachandran, K. I., “A Study on the Classification Ability of Decision Tree and Support Vector Machine in Gearbox Fault Detection”, Applied Mechanics and Materials, vol. 813-814, pp. 1058-1062, 2015.

2014

Journal Article

T. Praveenkumar, Dr. Saimurugan M., Krishna Kumar P., and Ramachandran, K. I., “Fault Diagnosis of Automobile Gearbox Based on Machine Learning Techniques”, Procedia Engineering, vol. 97, pp. 2092–2098, 2014.[Abstract]


Gearbox is an essential device employed in industries to vary speed and load conditions according to the requirements. More advancement in its design and operation leads to increase in industrial applications. The failure in any of the components of gearbox can lead to production loss and increase maintenance cost. The component failure has to be detected earlier to avoid unexpected breakdown. Vibration measurements are used to monitor the condition of the machine for predictive maintenance and to predict the gearbox faults successfully. This paper addresses the use of vibration signal for automated fault diagnosis of gearbox. In the experimental studies, good gears and face wear gears are used to collect vibration signals for good and faulty conditions of the gearbox. Each gear is tested with two different speeds and loading conditions. The statistical features are extracted from the acquired vibration signals. The extracted features are given as an input to the support vector machine (SVM) for fault identification. The Performance of the fault identification system using vibration signals are discussed and compared.

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2013

Journal Article

P. K Marimuthu, Krishna Kumar P., Rameshkumar, K., and Dr. K. I. Ramachandran, “Finite element simulation of effect of residual stresses during orthogonal machining using ALE approach”, International Journal of Machining and Machinability of Materials, vol. 14, pp. 213–229, 2013.[Abstract]


This paper presents a finite element model that has been developed to predict the effect of residual stress induced in the work material during multiple pass turning of AISI 4340 steel. Chip morphology and force variation during machining are also quantified using the FE model. Finite element model was developed using arbitrary Lagrangian-Eulerian formulation along with Johnson-Cook material model and Johnson-Cook damage model. The finite element model developed in this study was validated experimentally by studying the chip morphologogy and cutting force variation during the machining. Results indicate that there is good correlation existing between numerical results and experimental results.

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2012

Journal Article

K. Rameshkumar, Sumesh, A., Krishna Kumar P., and T, C. Austin V., “Productivity Improvement of a Manufacturing Enterprise using Lean Tools: A Case Study in Discrete Manufacturing Sector”, Indore Management Journal, vol. 3, no. 2, pp. 34-4, 2012.

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2013

Conference Proceedings

Krishna Kumar P., Vishnu, J., Ramachandran, K. I. ., and Rameshkumar, K., “Finite Element Modelling of Residual Stress in High Speed Machining of Titanium Alloy”, CAE international conference, IIT, Chennai. 2013.

2012

Conference Proceedings

Krishna Kumar P., K., R., and Ramachandran, K. I., “Vibration based Tool Condition Monitoring (TCM) in machining of Titanium alloy (Ti-6Al-4V) using machine Learning Algorithms”, International Conference on Optimization, Computing & Business Analytics (ICOCBA 2012).- ORSI International Conference. 2012.

2009

Conference Proceedings

Krishna Kumar P. and K, R., “Simulation optimization in a Kanban Controlled Flowshop”, ORSI International Conference. 2009.

2009

Conference Proceedings

Krishna Kumar P. and K, R., “Finite Difference Modelling of Laser Drilling for Machining Silicon Carbide”. National Engineering College, Kovilpatti., 2009.

2009

Conference Proceedings

Krishna Kumar P. and K, R., “End milling process parameter optimization using Particle Swarm Optimization Algorithms”, International conference on Emerging Research and Advances in Mechanical Engineering. Velammal Engineering College, Chennai., 2009.

Under Review

  • Krishnakumar, P., Rameshkumar K, Ramachandran, K.I., Machine learning based tool condition classification using AE and vibration data in a high speed milling process using wavelet features. Intelligent Decision Technologies: An International Journal, IOS, under review- submitted on 06-01-2017.
  • Krishnakumar, P., Rameshkumar K, Ramachandran, K.I., Acoustic emission based tool condition classification in a precision high speed machining of titanium alloy (Ti-6Al-4V): A machine learning approach. International Journal of Computational Intelligence and Applications, under review- submitted on 15-03-2017.
  • Krishnakumar, P., Rameshkumar K, Ramachandran, K.I., Feature level vibration and acoustic emission sensor signal fusion to improve classification efficiency in tool condition monitoring using machine learning classifiers. IJPHM, under review -submitted on 19-05-2017.
Faculty Research Interest: